weiland



A. WEILAND.

CARBURETER.

APPLICATION FILED JAN. 21. 1919.

1,345,298, Patented June 29, 1920.

ATTORNEY.

UNITED STATES PATENT OFFICE.

ALFRED WEILAND, OF NEW YORK, N. Y.

CABBURETER.

1 345 298. Specification of Letters Patent.

Application filed January 27, 1919. Serial No. 278,348.

To all whom it may concern:

Be itknown that I ALFRED WEILAND, a citizen of the United states, and a resident of New York, county of New York, and State of New York, have invented certain new and useful Im rovements in Carbureters, of which the ollowing is a specification.

Some of the ob'ects of the present invention are to provi e means for replenishing the liquid fuel reservoir of a carbureter from a low level tank; to provide means for preventing flooding of the carbureter when themotor is at rest; to provide means for establishing a negative pressure upon a fuel reservoir of a carbureter when the motor is running and to maintain such negatlve pres- ,sure when the motor comes to rest; to provide an auxiliary priming device for a carbureter; and to provide other improvements as will hereinafter appear.

In the accompanying drawings Figure 1 represents a sectional elevation of a carbureter embod ing one form of the present invention; and Fig. 2 represents a plan of the same.

Referring to the drawings one form of the invention'is shown wherein a carbureter casing 10, of any suitable form or shape is arranged to provide a transverse air passage 11, a carbureting chamber 12, and a main fuel reservoir 13.

For the purpose of feeding liquid fuel to the carbureting chamber 12, the main reservoir 13 has an outlet 14 arranged in a bottom partition 15, by which the fuel is delivered to a storing reservoir 16 below the main reservoir 13. This storing reservoir 16 has an outlet 17, preferably formed by a downwardly converging wall 20 to discharge into a supply or feeding chamber 21, which has a communicatlon by way of a channel 22 with a jet reservoir 23 having a discharge port 24. O

In order to control the passage of liqu d fuel through the outlet. 14, a yalve 25 is provided having fixed connection with a spindle 26, which has a suitable bearing in a bushing 27 provided with ports 28, whereby the fuel has free flow to the outlet 14. This spindle 26 projects into the main res ervoir 13' and has connection with a lever 30 suitably pivoted at 31 and carrying on its other end a float 32, by which variations in the liquid level determine the opening and closing of the valve 25.

For feeding the liquid fuel from the storing reservoir 16 in regulated quantities theoutlet 17 is arranged to be sealed and unsealed by the liquid content of the supply chamber 21, this latter having an air vent passage 33 to the exterior of the casing 10, the inner end of which is above the normal liquid level in the chamber 21. Thus as the content of the chamber 21 is depleted, the entering air bubbles upward through the outlet 17 to cause the fuel in the storing reservoir 16 to replenish the supply chamber 21 gradually. When the entering liquid has raised the level in the chamber 21 to a height where the outlet 17 is sealed, further feeding of the chamber 21 ceases. In the normal operation of the carbureter the level in the chamber 21 remains substantially in the plane of the mouth of the outlet so that there is a substantially continuous bubbling through of air and the addition of increments of fuel to the supply chamber 21.

For the purpose of regulating and controlling the fuel to the carbureting chamber 12, the discharge port 24 opens within a cylindrical passa e 34 formed by a cylindrical bushing xed to the casing 10 and forming a support and bearing for the body portion of an oscillatable throttle valve 36, the other end of which has bearing upon a cylindrical stem 37 projecting into the chamber 12. This stem is arranged in spaced relation with the end of the bushing to provide a circumferential passage 40 in the plane of a pair of ports 41 and 42 formed in the throttle valve 36 and forming the discharge jet proper. An open ended tube 43 extends from the stem 37. being spaced from the bushing 35 to provide a passage 44 by which air may be directed from the port 41 downwardly throughthe liquid when the throttle is in closed position and thus serve as an auxiliary priming means. The stem 37 forms a bearing for a reciprocable hollow member 45 carrying on one end a needle valve 46 for regulating the opening of the port 24, and on the other end Patented June 29, 1920.

.side of the piston 17 opposite to the air side is in communication with the carbureting chamber 12 by way of the alined ports 54 and 55. The construction is such that the motor intake pressure directly controls the needle valve46 so that itopens, partially opens or closes the port 24 in accordance with the load and working conditions of the motor.

For-the purpose of replenishing the main reservoir 13 from a low level tank by the negative pressure of the motor intake, a conduit is provided which is'arranged to establish communication between the main reservoir 13, above the liquid level therein, and the carbureting chamber 12 or any suitable point on: the motor side of thethrottle valve 86. A pipe 61 from the low level tank (not shown) has its discharge end terminating within and communicating with the main reservoir '13 above the liquid level therein, so that it is subjected to the conditions of negative pressure transmitted by the conduit 60 as a medium.

In order to prevent overflow of the liquid fuel by way of the main jet into the carbureting chamber 12, when the motor is at rest and the negative pressure returns to normal, the conduit 60 has its outlet 62 laterally disposed and terminating at a'low point of the chamber 12, and adjacent thereto a cupped recess 63 is formed in the floor of the casing 10 to encircle the bushing 35 so that any overflow of liquid fuel will collect in the recess 63. Such collected liquid will efiectually seal the opening to the con duit 60, thereby preventing equalization of pressure upon the liquid in the main reservoir 13 and consequently there can be no flooding of the carbureting chamber. The relatively small quantity of collected fuel,

due to the temporary overflow, serves also as a priming charge when the motor is again started, and as soon as this is taken. up the conduit 60 has its outlet 62 unsealed and working conditions are restored.

To admit air to the carbureting chamber i 12 by way of the passage 11, the latter is in communication with an air'intake pipe 6-1, preferably" subjected to the'exhaust or other 'sourceof heat, so that the entering air is preheated'in the desired manner before entering the carbureting chamber.

Wh1le the" foregoing, means for preventployed, wherein thefuel is supplied to the main fuel reservoir from a low level fuel supply tank by utilizing the negative pressure of the motor intake.

It will now be apparent that a complete, unitary structure has been devised capable of carrying out the ends desired whereby abalance of pressure'in the main fuel reservoiris prevented when the motor comes to rest and the negative pressure in the intake is restored to normal. Inconsequence there can be no overflow to the earbureting chamber by way of the main jet and flooding is entirely prevented. quantity of liquid, which does overflow. to seal the bypass conduit forms a convenient puddle to act as'a priming charge as soon as the motor is again turned over.

Having now described the invention what I claim and desire to protect by Letters Patent is 1. The combination ofa reservoir, means forming a communication between said reservoir and a chamber subject to the intake pressure of a motor of the explosive type, and means including a liquid seal to prevent flow by gravity from said reservoir when the motor intake pressure is relieved.

2. In a carbureter, the combination of a reservoir arranged to be supplied from a low level source of supply, means to cause said reservoir to be replenished from said source by negative pressure-in the motor intake, and means including a liquid seal to prevent a flow by gravity from said reservoir when the motor intake negative pres sure is relieved.

3. In a carbureter, the combination of a reservoir arranged to be suppliedfrom a low level source of supply, and a conduit forming a' communication between said reservoir and the motor intake, said conduit having an inlet at the motor intake end arranged to be liquid sealed by any overflow of liquid fuel from the carbureter when the motor is at rest.

4:. In a carbureter, the combination of a reservoir arranged to be supplied from a low level source of supply, a conduit forming a communication between the said reservoir and the motor intake, said conduit having an inlet at the motor intake end arranged to berli'quid sealed by any overflow of liquid fuel from thecarbureter when the motorisat rest, and means adjacent said inlet to collect said overflow to form a priming charge.

Further the small 5. In a carbureter, the combination of a casing forming a reservoir and a carbureting chamber, means forming a passage for liquid fuel from said reservoir to said 5 chamber, said casing having a recess below the point of discharge of said passage, and a conduit between said chamber and said reservoir, said conduit having an inlet within said recess.

Signed at Philadelphia, in the county of 10 Philadelphia and State of Pennsylvania, this 16th day of January, A. D. 1919.

ALFRED WEILAND. 

